@book { MarketingfrHandelsmarken,
    title = "Marketing für Handelsmarken",
    author = "Joachim {Hurth} and Hermann {Sievers}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07002-6",
    url = "https://www.peterlang.com/document/1050702"
}